I’ve implemented this — essentially forwarding all of my rklau.com e-mail to my Gmail account, where its spam filter grabs all spam, and makes all non-spam available for download via POP — and it’s wonderful. Spam has gone from 150-200 messages a day to zero — making time on my Treo much more efficient, and adding a whole lot less clutter to my Outlook inbox. (Read the comments for another solution that involves re-forwarding the Gmail mailbox so that you can use IMAP on the messages — Gmail doesn’t support IMAP at this time — but so far I haven’t felt the need for IMAP. If needed, I’ll go that route.)